Poise-lock for scales.



PATENTED JUNE 2, 1908. W. E. FINCH. POISE LOCK FOR SCALES.

APPLIUATIOI FILED APR- 15. 1907;

tn: NORRIS Plrnu cm. wasnnvam UNITED STATES PATENT OFFICE.

WILLIS E. FINOH, OF DETROIT, MICHIGAN, ASSIGNOR TO THE W. F. STIMPSON COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

POISE-LOCK FOR SCALES.

To all whom it may concern:

Be it known that I, WILLIs E. Fnvcn, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Poise-Locks for Scales, of which the following is a specification, reference being had therein to the accompanying drawings.

It is the object of the invention to provide a simple and inexpensive locking device for the poise of a scale beam, and to this end the invention consists in the construction as hereinafter set forth.

In the drawings, Figure 1 is a perspective view of the poise in engagement with the beam; Fig. 2 is a transverse section thereof; Fig. 3 is a longitudinal section; Fig. 4 is a perspective view of the locking member detached and Fig. 5 is a section similar to Fig. 2, illustrating a modification.

A is the scale beam, of any suitable construction, and B is the poise sleeved thereon, so as to be freely slidable. To attach my improved locking device, the poise B is bored, preferably vertically to intersect the transverse slot throughwhich the beam A passes. In this bore C is placed the locking member D, which may be formed of a rod or pin, cut away at E to provide clearance for the beam, and having an inclined or wedge portion F. The latter is so arranged that when the pin is moved in one direction in the recess C, the wedge will bind against the beam and frictionally lock the poise.

G is a spring, which is dropped down into the lower end. of the recess C, and bears against the lower end of the pin, forcing the same upward. The upper end of the pin projects out from the recess C and forms a push button for depressing the pin and disengaging the wedge from the beam.

With the construction as described, it will be understood that the poise is self-locking, and will be held from displacement at every point to which it may be adjusted. At the same time, the operator may freely slide the poise by placing his thumb upon the upper end of the rod D and depressing it sufiiciently to disengage the Wedge.

If it is desired to hold the pin from locking, this may be accomplished by the modified construction illustrated in Fig. 5, in which a shoulder H is formed in the upper portion of the pin for engaging a detent, such as the Specification of Letters Patent.

Application filed. April 15, 1907.

Patented June 2, 1908.

Serial No. 368,321.

screw I in the poise B. The pin D is formed with sufficient clearance in the bore, or recess C, so that it may be moved laterally into or out of engagement with the detent, and thus the operator can at will either lock the poise or look the pin to permit the poise to freely slide.

What I claim as my invention is:

1. The combination with a scale beam and a poise slidably engaging the same, said poise having a recess intersecting the path of the beam therethrough, of a member placed in said recess, having a wedge portion formed thereon and automatic means for engaging said wedge portion with the beam to lock said poise thereon.

2. The combination with a scale beam and a poise slidable thereon, said poise having a recess of a member placed in said recess in said poise which intersects the path of said beam, a wedge portion on said member for engaging said beam, and a resilient member for forcing said wedge into engagement.

3. The combination with a scale beam, of a poise slidable thereon having a recess intersecting the path of said beam, a member placed in said recess having a wedge portion for engaging said beam, and an operating portion projecting out from said recess and resilient means for forcing said member out- Ward and said wedge into engagement with the beam.

4. The combination with a scale beam, of a poise slotted to slidably engage said beam and having a transversely extending recess intersecting said slot, a pin placed in said recess having a portion thereof cut away to clear said beam, and provided with a wedge portion for engaging said beam.

5. The combination with a scale beam, of a poise slotted to slidably engage said beam and having a transversely extending recess intersecting said slot, a pin placed in said recess having a portion thereof cut away to provide clearance for said beam and also provided with a wedge portion for engaging said beam and a spring in said recess for being cut away to provide clearance for said beam and havlng a wedge portion at lts lower end for engaglng said beam when said pin is pressed upward by said spring, the

beam, a spring for yieldably pressing said wedge into engagement with said beam and a detent for engaging said pin to lock the 15 same from movement under the tension of said spring.

In testimony whereof I aifix my signature in presence of two Witnesses.

WILLIS E. FIN OH.

Witnesses JAMES P. BARRY, N ELLIE KINSELLA. 

